79 research outputs found
Bis(4-cyanophenolato)[hydrotris(3,5-dimethylpyrazolyl)borato]nitrosylmolybdenum(II)–4-hydroxybenzonitrile–dichloromethane (1/1/1)
In the title compound, [Mo(C15H22BN6)(C7H4NO)2(NO)]·C7H5NO·CH2Cl2, the central MoII atom adopts a distorted cis-MoO2N4 octahedral geometry with the hydrotris(3,5-dimethylpyrazolylborate) anion attached to the metal in an N,N′,N′′-tridentate tripodal coordination mode. Two O-bonded 4-cyanophenolate anions and a nitrosyl cation complete the coodination of the MoII atom. Two intramolecular C—H⋯O and one C—H⋯N hydrogen bonds help to establish the configuration of the complex molecule. The crystal structure is stabilized by intermolecular C—H⋯N and C—H⋯O hydrogen bonds
(4-tert-Butylpyridine)chlorido[hydrotris(3,5-dimethylpyrazol-1-yl)borato]nitrosylmolybdenum(I) dichloromethane monosolvate
In the title compound, [Mo(C15H22BN6)Cl(NO)(C9H13N)]·CH2Cl2, the MoI atom adopts a distorted MoClN5 octahedral geometry with the hydrotris(3,5-dimethylpyrazolyl)borate anion in an N,N′,N′′-tridentate tripodal (facial) coordination mode. A 4-tert-butylpyrine ligand, chloride anion and a nitrosyl cation complement the coodination of the MoI atom and an intramolecular C—H⋯Cl hydrogen bond helps to stabilize the configuration of the complex molecule. The packing is stabilized by an intermolecular C—H⋯Cl hydrogen bond involving the complex molecule and the CH2Cl2 solvent molecule
1-(4-Chlorobenzoyl)-3-cyclohexyl-3-methylthiourea
In the title compound, C15H19ClN2OS, the dihedral angle between the amide and thiourea fragments is 58.07 (17)°. The cyclohexane group adopts a chair conformation and is twisted relative to the thiourea fragment, forming a dihedral angle of 87.32 (18)°. In the crystal, N—H⋯S hydrogen bond links the molecules into chains running parallel to the a-axis direction
N-[(Piperidin-1-yl)carbothioyl]benzamide
In the title compound, C13H16N2OS, the piperidine ring exhibit a classical chair conformation. In the crystal, the molecules are linked by N—H⋯O hydrogen bonds, forming zigzag chains running parallel to the c axis
3,3′′,4,4′′-Tetramethoxy-1,1′:4′,1′′-terphenyl
The title molecule, C22H22O4, is centrosymmetric with an inversion centre located at the centre of the benzene ring. The 3,4-dimethoxybenzene fragment is essentially planar [maximum deviation = 0.400 (2) Å] and twisted relative to the central benzene ring, forming a dihedral angle of 21.25 (7)°. In the crystal, C—H⋯O hydrogen bonds link the molecules into a two-dimensional polymeric structure lying parallel to (100)
Crosstalk improvement of polymer in glass thermo-optical multimode interference switch
A new structural design of combined variable optical attenuator (VOA) and optical switch has been proposed in this paper. The design is based on the multimode interference (MMI) architecture and it has been demonstrated for crosstalk improvement of optical switch. The device operates by manipulating thermo-optic (TO) effect that naturally existed in all optical waveguide material. By applying a polymer on glass material platform, the optimized VOA with optical attenuation of 21.52 dB has been achieved with applied power of 36.4 mW. The simulation result shows that the VOA helps to achieve significant improvements of optical switch performance particularly in crosstalk reduction up to 89.66%
1-Benzoyl-3-ethyl-3-phenylthiourea
In the title compound, C16H16N2OS, the conformation at the two partially double C—N bonds of the thiourea unit is E. The amide group is twisted relative to the thiourea fragment, forming a dihedral angle of 62.44 (16)°, and the two phenyl rings form a dihedral angle 75.93 (18)°. In the crystal, molecules are linked by N—H⋯S hydrogen bonds, forming centrosymmetric dimers
1-Benzoyl-3-[4-(3-benzoylthioureido)phenyl]thiourea
The molecule of the title compound, C22H18N4O2S2, lies across a crystallographic inversion centre. The molecule adopts a syn–anti configuration with respect to the positions of the carbonyl groups and terminal phenyl rings relative to the thione S atom across the C—N bond. There are two intramolecular N—H⋯O and C—H⋯S hydrogen bonds within each molecule, resulting in the formation of four six-membered S(6) rings. The central and terminal rings make a dihedral angle of 13.55 (15)°. In the crystal, molecules are linked by intermolecular C—H⋯S hydrogen bonds, forming R
2
2(14) rings and resulting in zigzag chains
Propyl 2-(3-benzoylthioureido)acetate
The title compound, C13H16N2O3S, is a thiourea derivative with benzoyl and propoxycarbonylmethyl groups attached to the two terminal N atoms. These groups adopt trans and cis configurations, respectively, with respect to the S atom across the thiourea C—N bonds. The compound crystallizes in the P21/c space group with Z = 8, resulting in two unique molecules in the asymmetric unit linked by C—H⋯S and C—H⋯O hydrogen bonds, forming a one-dimensional zigzag chain along the c axis
3-(3-Methoxybenzoyl)-1,1-diphenylthiourea
The thiono and carbonyl groups in the title compound, C21H18N2O2S, adopt an anti disposition with respect to the central C—N bond. The diphenylamine rings are twisted relative to each other by a dihedral angle of 82.55 (10)°. The 3-methoxybenzoyl fragment is twisted relative to one of the diphenylamine rings, forming a dihedral angle of 74.04 (9)°. In the crystal, pairs of intermolecular N—H⋯S hydrogen bonds link the molecules into centrosymmetric dimers, forming columns parallel to the a axis
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